Conveying device



July 7, 1942. MAURER 2,289,022

CONVEYING DEVICE- Fi led June 12, 1940 Y 9 Sheets-Sheet 1 July 7, 1942. G. MAURER CONVEYING DEVICE Filed June 12, 194Q 9 Sheets-Sheet 2 July 7, 194 2. G. MAURER CONVEYING DEVICE Filed June 12, 1940 9 Sheets-Sheet 3 Jilly G. MAURER 2,289,022

' .CONVEYING DEVICE Fil'ed June 12, 1940 9 Sheets-Sheet 4 July 7, 1942.

G. MAURER CONVEYING DEVICE Filed June 12, 1940 '9 Sheets-Sheet 5 July 1, 1942. G. MAURER 2,289,022

CONVEYING DEVICE Filed June 12, 1940 9 Sheets-Sheet 6 F/ 'g. Z c I W AB'WIM YWHmJ July 7, 1942. e. MAURER CONVEYING DEVICE Filed June 12, 1940 9 Sheets-Sheet 7 man o]: GOTTFH/ED MA URER July 7, 1942. G. MAURER CONVEYING- DEVICE Filed June 12, 1940 9 Sheets-Sheet 8 July 7, 1942. s. MAURER CONVEYING DEVICE Filed June 12, 1940 9 Sheets-Sheet 9 Patented July 7, 1942 UNITED STATES PATENT OFFICE CONVEYING BEVICE Gottfried Maurer, Zurich, Switzerland, assigncr to Muller & .Cie, Aktiengesellschaftl.Maschinen fabrik, Bragg, Switzerland, aljoint-stock company of Switzerland Application June 12, 1940,Serial No. 340,207 In Switzerland April 11,1940

9 Claims.

One of the objects of the present invention is to provide a device in which a drivemechanism is provided adapted'to move the bars at the beginning of their forward motion at a greater and afterwards at a lower speed. This apparatus is specially, but not exclusively, used as a gluing machine, particularly as a'veneer gluer.

The veneer 'gluersheretofore proposed have no movable members pressing the goods such as the bars 309,099, 356,090/1, but immovable pressing elements between which the goods to be glued move. In theseknown gluers said m'otion'is imparted to the goods by feed rollers provided at the inlet end of the machine. These feed rol1 ers thus shove the goods through between the braking pressing elements. This manner of moving the work pieces has various disadvantages and results in a great number of damaged veneers. come warped and broken between the feed rollers and the pressing elements. In the known devices the veneers to be glued together often become displaced with regard to one another, so that the setting of the glue is impaired.

My invention remedies these disadvantages. In my apparatus the veneers are not shoved through between the pressing elements by a driving means but they are taken along by the after the other group has begun tomove forward at a lower speed.

in my pending applications N0s.l'

These latter are liable to be- .Another object of my invention is to arrange being. had to the accompanying drawings in which- .and 5).

of the group comprising the bars 3, 4. may be seen from this Fig. 3 -the.bars 3 are Figs. 1a, 1b, 1c are parts of a planview of a first embodiment,

Figs.-2a, 2b and 2c are parts of a'longitudinal section taken on line Il-II- of Fig. 3,

Fig. 3 is a cross section, taken on line III-III of Fig. 1a,

Figs. laand 4b are-parts of a longitudinal section similar to that in Figs. 2a, b, 0, but of a sec- :ond embodiment,

'Fig. 5 is a part of a cross section similar to-that in Fig. 3, but of the second embodiment,

Fig. 6 is a part of a cross section; illustrating a detail of the second embodiment.

Themachines shown in the drawings have two groups of bars. One group consists of the upper and lower bars I, 2 respectively-and the other of the upper and lower bars 3,-4 respectively. The upper and'lower bars I and 2 of theone group are mounted on a carriage 5 and the bars 3 and 4 of the other group on a carriage 6, each of these carriages!) and 6 being longitudinally movable. Carriage 5 is-provided with four rollers I and carriage 6 with four rollers 8. These rollers run on rails 9 and 10 arranged on themachine frame. Theleft hand rollers (Fig. 3) of both carriages are profiled rollers running. on the correspondingly shaped rails l9, while the right hand rollers have cylindrical bearing surfaces and run on the flat rails. 9. Each of the two carriages has four upper and lower columns H and 12. The upper and lower supporting frames l3 and M are slidably mounted on these upper and lower columns H and I2 of each carriage by means of the guides 16 and I1 (Figs. 3 To the one supporting frame It the bars I and'to the other supporting frame l3 the bars 3 are attached, while thebars 2 are fixed to the one supporting frame [4 and the bars .4 to the other supporting frame i M. Fig. 3 illustrates a -section through the carriage 6 As resiliently fixed to the upper supporting frame 13 by meansof the springs 15 and. the bolts l8, while the lower bars 4 are rigidly connected with the lower supporting frame I l. The upper and lower supporting frames of each group with the corresponding bars have a constant tendency to recede from each other. Owing to its weight the lower supporting frame I4 is urged to move downwardly, whichdownward motion is limited by the stop rollers 19 attached to the machine frame. However, under the. influence .of the helical springs 2|, the upper supporting frame l3 of each carriage is urged to move upwardly.

These springs 2| are located in the hollow upper columns H of the carriage. At one end they bear against the bottom of these columns and at the other end against the upper plates 22 fixed to the supporting frames l3. Stop rollers 24 are mounted on the upper part 23 of the machine frame; the plates 22, when the frames |3 have reached their uppermost position, strike against these stop rollers 24.

The part 23 of the machine frame is movable vertically, so that the distance between the upper and the lower beds of bars can be adapted to the thickness of the goods to be conveyed. This part 23, therefore, rests on the spindles 25, whose lower portions are provided with threads engaging female threads in sockets 21 fixed to the immovable part 26 of the machine frame. These spindles may be driven with the help of a hand wheel 28 through bevel wheels. Each spindle carries a bevel wheel 29. The two left hand spindles 25 (Fig. 1a) are operated by means of the bevel wheels 30 mounted, together with the hand wheel 28, on the shaft 3|. This shaft 3| is mounted on the upper part 23 of the machine frame. On this upper part 23 two intermediate shafts 32 are located, transmitting the motion of the hand wheel to the right hand spindles 25 (Fig. 1c). The bevel wheels 33 on these shafts 32 engage the bevel wheels 29 of the left hand spindles 25 and the bevel wheels 34 cooperate with the wheels 29 of the right hand spindles 25 (Figs. 1a and 1c).

In the first place, the following statement describes the drive for the forward and backward motion of the bar groups. For the purpose of producing this motion two pairs of cam discs 35, 31 are fixed to a common shaft 35. This latter is driven by a motor 39 with the aid of a change gear 38. The one pair of cam discs, 36, serves for the reciprocating moving of the carriage 6 comprising the bars 3 and 4, and the other pair, 31, for the moving of the carriage comprising the bars I and 2. The rods 42 and levers 43 are pivotally fixed to the bolts 40 carrying the rollers 4| which cooperate with the cam discs.36. At the other end, the rods 42 are pivotally mounted on the lugs 44 of the part 45 between the columns H and I2 of the carriage 6. The levers 43 are rockers placed on the shaft 46. They are under the effect of the springs 41 fixed at the one end, to these rockers, and at the other end, to a stationary point of the machine. These springs 41 continuously press the rollers 4| against the cam discs 36. The rods 50 and the levers 5| are pivotally fixed to the bolt 48 carrying the rollers 43 which cooperate with the cam discs 31. The cranked rods 55, at the other end, are pivotally mounted on the lugs 52 of the carriage 5. The levers 5| are rockers placed on the shaft 45. They are under the effect of the springs 53 which, similarv to the springs 41 are, at the one end, fixed to these rockers 5| and, at the other end, to a stationary point of the machine. These springs 53 continuously press the rollers 49 against the cam discs 31.

It may easily be understood that, on rotation of the shaft 35, the rod 42 moves the carriage 6 comprising the bars 3 and 4, and the rod 50 moves the carriage 5 comprising the bars I and 2 to and fro. The speed at which these carriages move, will be described later on.

The mechanism for the vertical motion of the bars is described as follows: As already mentioned, the upper and lower supporting frames l3 and l4 carrying the bars of the single groups have a tendency to recede from each other. Thus it follows that, for producing the desired vertical motion of the bars, means must be provided to counteract this tendency. For this purpose, in the embodiment shown in Figs. 1a to 10, 2a to 20 and 3 the blocks 54 are fixed to the upper and lower supporting frames l3 and I4, which blocks have inclined ascents 55, 53 forming part of the control surfaces cooperating with the control rollers 51. These rollers 51 are carried by the rocking levers 58 mounted on the machine frame. These levers 58 are under the effect of the return springs 59 which continuously try to move the levers 58 toward the stops 63 fixed to the machine frame. Be it supposed that the carriage 6 comprising the bars 3 and 4, seen in Fig. 3, moves to the right. The rocking levers 58 belonging to this carriage bear against the stops 60 under the effect of the springs 53. As soon as, on the right hand motion of the carriage 6 carrying the bars 3 and 4, the ascents 55 engage the rollers 51, the upper supporting frame |3 carrying the bars 3 is, contrary to the effect of the springs 2| (Fig. 2), moved downwardly, and the lower supporting frame [4 is, contrary to the effect of its weight, moved upwardly. The upper and lower bars 3, 4 respectively of the carriage 6 approach one another. The incline of the ascents 55 may be chosen so that, at one time, the bars approach one another equally over their whole length or unequally, for instance, quicker at the inlet (at the left of Fig. 2a) and slower at the outlet end (at the right in Fig. 2c) When the carriage 6 with its bars 3 and 4 has finished its right hand motion, its blocks 54, seen in Figs. 2a and 2c are on the right of the corresponding rollers 51. When the left hand motion of the carriage 5 begins, the levers 58, on the ascents 56 striking the rollers 51 of the carriage 5, are moved away from the stops 30 contrary to the effect of the springs 59. However, at the moment, when the outermost left hand position (Fig. 2a) of the carriage 6 is reached, the rocking levers 58, under the effect of the return springs 59, return to the position shown for the carriage 6 comprising the bars 3 and 4 in Figs. 2a, b, c.

The manner in which the carriage 5 with the bars I and 2 and the carriage 6 comprising the bars 3 and 4 move forward and backward will be described in the following statement, reference being had to Figs. 2a, b, c. in a counterclockwise direction (see arrow). As may be seen from the position of the rollers 4| and 49 relative to their cam discs, the carriage 6 comprising the bars 3 and 4 is in its left hand return position, while the carriage 5 comprising the bar I and 2 moves forward (to the right) at a constant speed. From the mutual position of the blocks 54 and the rollers 51 is may be seen that the bar group 3, 4 of the carriage 6 is open, while the group I, 2 of the carriage 5, however, is closed. The carriage 6 and with it the bars 3, 4 now begins the right hand motion at a great speed and this until the rollers 4| make contact with the cam discs 36 at the point I), because the curves of these cam discs are steep between the points a and b. During this period the group of bars 3, 4 mounted on the carriage 6 is closed because the ascents 55 mount on to the rollers 51. From the point I) onward the carriage 6 with the bars 3, 4 moves at a lower speed, owing to the fact that the curves of the cam discs 36 now ascend but slightly. The carriage 6 i. e. the bars 3, 4 having moved quickly according to the curve ab, the carriage 5 i. e. the bars I, 2 have moved The shaft 35 rotates Y forward ata low-speed accordingto-thecurve AB of: the discs 31: Between the points b, cand B,1C

the two-groups ofbars move forward at the same speed. While, from point :cthe. carriage 6 continues to move forward at. a. low speed andwith closed bar group 3, 4,?thecarriage 5 with its bars I, Tafterthe point C, under the eifect'of the springs 53, moves at 'a great speed to its left hand returnposition corresponding to thepointqD of the. cam disc 3'l." Shortly before the point C, that is; at the last moments'of the-righthand motionbf-theicarriage 5 carrying the bars I, Z, the: ascents 56 of the blocks 54 'have'descended the" rollers'15'l, thebar'group l, 2 of the carriage shortly before I, the bar group '3, 4 of the carriage 6 is opened and the carriage 6 with the bars 3, 4, after the point 1 has been passed, runs quickly to the left under the effect of the springs 41'.

The incline of the ascents 55 and 56 may be chosen so that thepressure exerted onthe goods to be conveyed may, at any movement of the forward motion, attain the valuessuitable for treatingithe goods.

In the embodiment shown in Figs. 4a, 4b, 5 and p 6 nothin but the vertical motion is produced by other means than intthefirst embodiment, all other. parts of t the machine. remain unchanged and are designated by the-samereference characters as before.

In place of the blocks with the ascents'55, 55 (Figs. 2a b 0) adapted to-ascend the rollers 51 on the rocking levers 58, control rollers 63, eccentrically mounted, are provided, cooperating with the horizontal-surfaces 64 of theblocks 65fixed to the supporting frames I3, l4 of .the carriage 5 with the bars I, 2 and the-carriage 6 with the bars 3, 4. These control rollers'63'are-carried by the eccentric .pins 66 which, in their turn, are placed on the ball bearings6l attached to the machine frame (Fig. 5). In order to move the supporting frames l3, l4 vertically, the eccentric pins 66 are rotated, wherebythe control rollers 63 eitherclose or open the bargroups, since the rollers 63 either approach the supportin framesl3,. M to .each other or allow them to recede from.

one another. The eccentric pins 66 are driven by the cam discs 68; 69.. For this purpose the levers I0 arefastened to-the eccentric pins 66. The levers BlLpivotally mounted on the shafts 19 are pivotally connected with thecorresponding levers 16 by means of the rods H, 12,13, 14, T5, 16,- I1, 18. The levers 8D carry rollers 8| cooperating with the cam discs, 68. 69. Springs continuously pressing the rollers 8| against thecam. discs may be omitted, for theeccentric pins. 66,. on the upper supporting frame I3, are alwaysin. such a position with regard to the axis of their. bearings, that the blocks 65 transmit the pres? sure exerted by the springs 2|, in such a way. to the control rollers 63 that therollers 8| are constantly applied to the camdiscs 68. In a like manner the eccentric pins 66 for the lower supporting frames l4 are always in such a, position, that the weight'of the supporting'frames 14 provides'for the rollers 8| bein constantly pressed omitted, because the controlrollers 63 simultaneously serve "as a stopping. means for the vertical motion of the supporting frames. The cam discs .69'for the lower supporting frames [4 are mounted on the same-shaft 35 as thecam discs 36, 3! for the forwardaand backward motion. One, two or more of these discs -69'might be provided; The cam discs 168 for the upper supporting frames 13 are arranged-on a shaft 82 parallel to the shaft 35. Shaft'BZ-is .driven by shaft 35 through the bevel gear illustratedin Fig. 6. The motion of the shaft 35is transmitted to the shaft82 by'means of the bevel wheels 84 on the vertical shaft 65 in that these wheelsengage the bevel wheels 183,- 86 ?of the shafts 35,82. There may be one, two or more cam discs 68 on the shaft 82. The position of the eccentric pins 66 may be chosen so that, at one-time, the bars approach one another either equally 'or unequally over their whole length.

Ledges 62 are provided on the upper barsat the inlet end .;of the machine. On feeding the goods 'to be glued fromthe-service table'6l (Fig. 2a) they are seizedby the ledges 62 and the lower bars ofthesame group moving at a high speed at the beginning 'of the right hand motion and are thus introducedbetween the two beds of bars.

Instead of the upper and the lower supporting frames, the lower ones. only might be vertically movable.

As may beseenfrom Fig. 3 the bars are hollow in order to .allow a heatingpmedium to flow through the bars;

While these embodiments of the invention have been illustrated: and described in such detail as to enable any one skilled inzthe art to practice the invention, nevertheless it is to be understood that the invention is not to .be limited. to any of the details disclosed, but, insteadyit will be understood that the invention' embraces suchembodiments of thebroad idea as fall within the scope of the subjoinediclaims, it being obvious that various changesmay be made without'departing from the spirit of the invention.

What I'claim-is:

1. In a conveying device, a frame, two conveying beds with an adjustable perpendicular dis tance from each other, each of said beds comprising a number of bars lying side by side, the bars of both beds being arranged in groups, guides on said frame, carriages adapted to move to and fro along said guides, other guides on said carriages, lower and upper supporting frames mounted on said carriages and free to move vertical-l y along said other guides, the supporting frames ofthe same carriage carrying the bars of one group, a drive mechanism adapted to move said carriages at the beginning of their forward motion at a greater and afterwards at a lower speed, and control means adapted to control the vertical movement of'said supporting frames on said carriages moving to'and fro.

2. In a conveying-device, two conveying beds with an adjustable perpendicular distance from each other, each of said beds comprising a number of bars-lying side by side, the bars of both beds being arranged in groups, carriages adapted to move to and fro, lower and upper supporting frames mounted on said carriages and'free to move vertically, the supporting frames *ofthe same carriage carrying the bars of one group," a.

drive mechanism adapted to move the carriages to and fro, control surfaces on said supporting against; the cam, discs .69.- Furthermore, the stop. rollers 1 I9, 24 of the first ::embodiment maybe frames, and control rollers adapted to move said supporting frames vertically by cooperating with said control surfaces.

3. In a conveying device, two conveying beds with an adjustable perpendicular distance from each other, each of said beds comprising a number of bars lying side by side, the bars of both beds being arranged in groups, carriages adapted to move to and fro, lower and upper supporting frames mounted on said carriages and free to move vertically, the supporting frames of the same carriage carrying the bars of one group, a drive mechanism adapted to move the carriages to and fro, control surfaces on said supporting frames, control rollers adapted to move i each other, each of said beds comprising a num- 3 ber of bars lying side by side, the bars of both beds being arranged in groups, carriages adapted to move to and fro, lower and upper supporting frames mounted on said carriages and free to move vertically, the supporting frames of the same carriage carrying the bars of one group, a drive mechanism adapted to move the carriages to and fro, a main frame, control rollers, pins eccentrically pivoted on said main frame and carrying said control-rollers, surfaces on said i supporting frames adapted to cooperate with said control rollers, and driving means adapted to rotate said pins in order to move said supporting frames vertically.

5. In a conveying device, two conveying beds with an adjustable perpendicular distance from each other, each of said beds comprising a number of bars lying side by'side, the bars of both beds being arranged in groups, carriages adapted to move to and fro, lower and upper supporting frames mounted on said carriages and free to move vertically, the supporting frames of the same carriage carrying the bars of one group, cam discs adapted to move the carriages at the beginning of their forward motion at a greater and afterwards at a lower speed, control surfaces on said supporting frames, and control rollers adapted to move said supporting frames vertically by cooperating with said control surfaces.

6. In a conveying device, two conveying beds with an adjustable perpendicular distance from each other, each of said beds comprising a number of bars lying side by side, the bars of both beds being arranged in groups, carriages adapted to move to and fro, lower and upper supporting frames mounted on said carriages and free to move vertically, the supporting frames of the same carriage carrying the bars of one group, cam discs adapted to move the carriages at the beginning of their forward motion at a greater and afterwards at a lower speed, a main frame, control rollers, pins eccentrically pivoted on said main frame and carrying said control rollers, surfaces on said supporting frames adapted to cooperate with said control rollers, and further cam discs adapted to rotate said pins in order to move said supporting frames vertically.

'7. In a device for conveying and pressing strips together, pairs of bars, longitudinally reciprocable in the direction of conveying, each pair comprising laterally spaced bars displaceable. laterally toward and away from each other during their longitudinal reciprocatory movement to grip and release strips to be conveyed, driving mechanism including a means for moving a first of said pairs of bars at the beginning of its conveying motion longitudinally at a greater speed and later at a slower speed, a separate means for moving a second of said pairs of bars at the beginning of its conveying motion and on the slower conveying motion of said first pair longitudinally at a greater speed in order to bring a newly gripped strip in contact with and to press it against the hindmost of other strips already in close contact with one another and gripped and conveyed by said first pair moving at a slower speed, and for moving said second pair later and on the return motion and on the following quicker conveying motion of said first pair at a slower speed rectilinearly in order to convey the strips in close contact with one another towards the outlet end of the machine, a first device operable to separate the bars of the first pair at the end of its conveying movement and on the slower rectilinear conveying movement of said second pair, to bring the trailing ends of the bars of said first pair together at the beginning of the following conveying movement of this first pair and during the slower rectilinear conveying movement of said second pair in order to grip a new strip, while the leading ends of the bars of said first pair remain spaced at the beginning of the conveying movement of said first pair, to bring the leading ends of the bars of said first pair together during the conveying movement of said first pair and the slower conveying movement of said second pair, and a second device operable to separate the bars of the second pair at the end of its conveying movement and on the slower rectilinear conveying movement of said first pair to bring the trailing ends of the bars of said second pair together at the beginning of the following conveying movement of this second pair and during the slower rectilinear conveying movement of said first pair in order to grip a new strip, while the leading ends of the bars of said second pair remain spaced at the beginning of the conveying movement of said second pair, to bring the leading ends of the bars of said second pair together during the conveying movement of said second pair and the slower conveying movement of said first pair.

8. In a device for conveying and pressing strips together, pairs of bars, longitudinally reciprocable in the direction of conveying, each pair comprising two laterally spaced bars displaceable laterally toward and away from each other during their longitudinal reciprocatory movement to grip and release strips to be conveyed, driving mechanism including a first cam disc for moving a first of said pairs of bars at the beginning of its conveying motion longitudinally at a greater speed and later at a slower speed, a second cam disc for moving a second of said pairs of bars at the beginning of its conveying motion and on the slower conveying motion of said first pair longitudinally at a greater speed in order to bring a newly gripped strip in contact with and to press it against the hindmost of other strips already in close contact with one another and gripped and conveyed by said first pair moving at a slower speed, and for moving said second pair later and on the return motion and on the following quicker conveying motion of said first pair at a slower speed rectilinearly in order to convey the strips in close contact with one another towards the outlet end of the machine, a first device operable to separate the bars of the first pair at the end of its conveying movement and on the slower rectilinear conveying movement of said second pair, to bring the trailing ends of the bars of said first pair together at the beginning of the following conveying movement of this first pair and during the slower rectilinear conveying movement of said second pair in order to grip a new strip while the leading ends of the bars of said first pair remain spaced at the beginning of the conveying movement of said first pair, to bring the leading ends of the bars of said first pair together during the conveying movement of said first pair and the slower conveying movement of said second pair, and a second device operable to separate the bars of said second pair at the end of its conveying movement and on the slower rectilinear conveying movement of said first pair, to bring the trailing ends of the bars of said second pair together at the beginning of the following conveying movement of this second pair and during the slower rectilinear conveying movement of said first pair in Order to grip a new strip, while the leading ends of the bars of said second pair remain spaced at the beginning of the conveying movement of said second pair, to bring the leading ends of the bars of said second pair together during the conveying movement of said second pair and the slower conveying movement of said first pair.

9. In a device for conveying and pressing strips together, two conveying beds with an adjustable perpendicular distance from each other, each of said beds comprising a number of laterally spaced bars, the bars of both beds being arranged in groups, carriages longitudinally reciprocable in the direction of conveying, lower and upper supporting frames mounted on said carriages and free to move vertically, the supporting frames of the same carriage carrying the bars of one group, driving mechanism including a means for moving the first of said carriages at the beginning of its conveying motion longitudinally at a greater speed and later at a slower speed, a separate means for moving the other of said carriages at the beginning of its conveying motion and on the slower conveying motion of said first carriage longitudinally at a greater speed in order to bring a strip newly gripped by the bars on the supporting frames of said other carriage in contact With and to press it against the hindmost of other strips already in close contact with one another and gripped and conveyed by the bars on the supporting frames of said first carriage moving at a slower speed, and for moving said other carriage later and on the return motion and the following quicker conveying motion of said first carriage at a slower speed rectilinearly in order to convey the strips in close contact with one another towards the outlet end of the machine, a first device operable to separate the supporting frames of said first carriage in order to separate the bars on them at the end of their conveying movement and on the slower rectilinear conveying movement of said second carriage in order to grip a new strip, while the leading ends of the bars on the supporting frames of said first carriage remain spaced at the beginning of the conveying movement of said first carriage, to bring the leading ends of the bars on the supporting frames of said first carriage together during the conveying movement of said first carriage and the slower conveying movement of said second carriage, and a second device operable to separate the supporting frames of said second carriage in order to separate the bars on them at the end of their conveying movement and on the slower rectilinear conveying movement of said first carriage, to bring the trailing ends of the bars on the supporting frames of said second carriage together at the beginning of the following conveying movement of this second carriage and during the slower rectilinear conveying movement of said first carriage in order to grip a new strip, while the leading ends of the bars on the supporting frames of the second carriage remain spaced at the beginning of the conveying movement of said second carriage, to bring the leading ends of the bars on the supporting frames of a said second carriage together during the conveying movement of said second carriage and the slower conveying movement of said first carriage.

GOTTFRIEJD MAURER. 

